Steam-muffler



(No Model.)

C. H. DE WITT.

STEAM MUPPLBR.

No. 310,654. Patented Jan'. 13, 1885.

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n /4 n 162 x /TH C Nrrnn Sfraris @einem CHARLES II. DE WITT, OF VEATI'IEBLY, PiuhlfSYLVANIA.

STEAM-MUFFLER.

SPECIFICATION forming part of Letters Patent lo. 310,65l-, dated January' 13, 1885.

A pplicaiion lcd June 138i.

Be it known that I, CrmnLns il. Dn Wrrr, a citizen of the United States, residing at Veatherly, in the county of Carbon, State of Pennsylvania, have invented a new and useful Improvement in Steam-llIui/l'lers, which improvement is fully set forth inthe following specification and accom pan yin g drawings, in which- Figure l is a vertical section of a steammuffier embodying my invention. Fig. 2 is a horizontal section in line x x, Fig. I.

Similar letters of reference indicate corresponding parts in the two figures.

My invention relates to improvements in a device for muflling escaping steam, whereby the noise of the same is quieted, said device consisting of a shell provided with boxes into which steam is admitted, from which it is discharged against the sides of the shell, so as to be reduced and weakened.

It further consists in providing the shell, through tubes projecting from the boxes, with a rim at the top thereof, so as to prevent the scattering of the steam as it iinally leaves the shell.

Referring to the drawings, A represents a vertically arranged cylinder or shell, into which the steam is admitted, and within which are secured a series of horizontally-arranged cylinders or boxes, B, which are closed at top, the bottom or bottom plate, B, of each box being open, so as to be in communicationwith the cylinder, the boxes being separated, leaving between them spaces O, which I term expansion -chambers`. The walls of the boxes are perforated, and to them are secured pipes or jets D, which communicate with the boxes projecting horizontally outwardly therefrom and at a right angle with the wall of the cylinder A.

E represents a rim or ilange at the top of the cylinder A, the same extending above the upper box B, and wit-hin said rim are horizontally arranged perforated plates or screens F, between which and the upper box is an expansion space or chamber, the lower plateresting on a shoulder, a, on the inner face of the rim, and having an upwardly-ex tending circumferential flange, Z), on which the upper plate is rested, said upper plate also having a circumferential ilange, c, which is (No model.)

secured to the rim E by bolts or screws, it being noticed that the lower plate is securely held in position by the upper plate, and both plates may be easily removed and readily replaced or reapplied, as desired. It will be seen that when the steam is admitted to the cylinder A it passes through the opening of the bottom plate of the lower box B, and thus enters said box, from which it is discharged through the pipes D, being directed and dashed against the side of the cylinder A. The steam expands in chamber C, and then enters the next box, and leaves the same through the pipes D, and the same operation is repeated through the upper box, or more boxes, if employed, the steam iinally passing through the perforated plates F and rising above the rim E, thus being entirely discharged from the cylinder. It will also be seen that the steam, owing to its passage through the boxes, impact against the side of the cylinder, expansion in the chambers C, and passage through the plates F, is reduced and weakened and disintegrated, and in this condition reaches the top of the cylinder, escaping therefrom with expended force and noiselessly. Owing to the rim E, which is continued above the plate F, the steam leaving the upper box is prevented from scattering, and thus discharged in a volume directly above the cylinder. rIhe bottom plates of the boxes B are provided with flanges d, whereby they may be screwed or bolted to the eylinderA and removed therefrom for purposes of cleansing, repairs, &c.; and in lieu of said iianges and the iianges b c of the plates F, I may employ lugs or sections of flanges, which accomplish the same purpose. The areas of the boxes and the discharges are greater than the inlet of steam, so that while noise is quieted the steam is not choked and an increased pressure of steam is not permitted to accumulate in the boiler.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In a steam-muffler, a shell within which is a box having an open bottom, a closed top, and a perforated wall, and straight tubes connected with said wall, communicating with the box through the perforations thereof, and projecting therefrom horizontally, and opening toward the wall of the shell, whereby the ICO steam is dashed directly against said Wall, substantially as and for the purpose set forth.

2. A shell provided with two or more boxes, located one above the other, with expansionchambers between them, each box having an open bottoni, a closed top, and a perforated Wall, and tubes connected with said wall projecting therefrom at a right angle to the Wall of the shell, substantially as and for the purpose set forth.

3. In a steam-muffler, a shell having a perforated box therein, and a horizontally-arranged perforated plate above the saine, said shell being continued upwardly, forming a flange which projects above the said plate, substantially as and for the purpose set forth.

4. In a steani-lnuii'ler, a shell having a perforated box therein, and a horizontally-arranged perforated plate above the saine, said shell being continued above said plate, and said box and plate having between theni an expansion-chamber, substantially as and for the purpose set forth.

5. A shell having perforated boxes located therein, one above the other, tubes connected with saidboxes, projecting horizontally therefrom at a right angle to the shell, a horizontally-arranged perforated plate above the box, an expansion-chamber between the perforated plate and the top box, and a top rim, which is a continuation of the shell above said plate, said parts being combined and operating as described, forming an improvement in steamniufflers.

CHARLES H. DE XVITT. lVitnesses:

F. XV. DE XVI'rT, Gno. H. JoNns. 

